Workpiece overturning device and overturning method

Abstract

The invention provides a device for workpiece overturning and an overturning method. The device for workpiece overturning comprises a base, an overturning table and an oil cylinder. The base is installed on the ground, the overturning table is rotationally connected to the base, a clamp is arranged on the overturning table and used for fixing a workpiece to be overturned to the overturning table, the telescopic end of the oil cylinder is connected with the overturning table, and the fixed end of the oil cylinder is connected with the base; the oil cylinder pushes the overturning table and the to-be-overturned workpiece fixed to the overturning table to rotate and ascend around the base, when the overturning table and the to-be-overturned workpiece fixed to the overturning table rotate to the highest point, oil feeding of the oil cylinder is stopped, the oil return flow of the oil cylinder is controlled to be smaller than a preset threshold value, and the overturning table and the to-be-overturned workpiece fixed to the overturning table overcome resistance of the oil cylinder through the gravity of the oil cylinder to slowly rotate and descend around the base. And the to-be-overturned workpiece falls to the ground to finish overturning. The device is simple in structure, when a workpiece to be overturned is fixed on the overturning table, the overturning table is pushed by the oil cylinder to rotate and ascend to the highest point, the workpiece slowly descends from the highest point by means of the gravity of the workpiece, and the whole overturning process is simple and easy to operate.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece flipping equipment, and in particular to a device for flipping a workpiece, and also to a flipping method. Background Art

[0002] With the rapid development of society, industries such as wind power generation, automobile industry, agricultural machinery, aerospace, etc. are also booming. These industries often need to weld some workpieces during the manufacturing process, especially the welding of large workpieces. In order to improve their work efficiency and welding quality, these large workpieces need to be frequently turned over.

[0003] In the prior art, in the process of turning over large workpieces, the common in-situ turning tooling, in addition to the lifting operation process, also needs to achieve 180° turning. In the process of turning over these large workpieces, multiple cylinders are often required to work together, that is, the first cylinder lifts and turns the large workpiece to about 90°, then connects to the second cylinder, and then removes the first cylinder, supports the first cylinder, and then the second cylinder works again to guide the large workpiece to turn over 180°. It can be seen that the existing in-situ turning tooling is complicated to manufacture, the operation process is relatively cumbersome, and the removal of the pin shaft will cause the workers to have high labor intensity, easy to make mistakes, and easy to cause serious accidents.

[0004] Therefore, how to make the workpiece turning tooling structure simple and easy to operate becomes a technical problem to be solved. Summary of the invention

[0005] The present application provides a device for turning over a workpiece to solve the problems that the existing in-situ turning tooling is complicated to manufacture, the operation process is cumbersome, and the removal of the pin will cause the workers to have high labor intensity and easy operation errors. The present application also provides a workpiece turning method.

[0006] The present application provides a device for flipping a workpiece, the device comprising: a base, a flip table and a cylinder; the base is used to be installed on the ground, the flip table is rotatably connected to the base, a clamp is arranged on the flip table, the clamp is fixed on the flip table, the clamp is used to fix the workpiece to be flipped on the flip table, the telescopic end of the cylinder is connected to the flip table, and the fixed end of the cylinder is connected to the base; the cylinder is used to push the flip table and the workpiece to be flipped fixed on the flip table to rotate and rise around the base, when the flip table rotates to the highest point, the cylinder stops supplying oil, and controls the return oil flow in the cylinder to be less than a preset threshold, the flip table and the workpiece to be flipped fixed on the flip table rely on their own gravity to overcome the resistance of the cylinder and slowly rotate and descend around the base until the workpiece to be flipped falls to the ground to complete the flipping.

[0007] Optionally, the clamp includes an axle seat, a bent plate and a lead screw; the axle seat is fixed on the flipping table, and a vertical fixed shaft is arranged on the axle seat, and one end of the fixed shaft is fixed to the axle seat; the first end of the bent plate is horizontally rotatably mounted on the fixed shaft, and a nut is arranged at the second end of the bent plate, and the lead screw is connected to the nut to realize the up and down movement of the lead screw, and the lead screw is used to fix the workpiece to be flipped on the flipping table by moving up and down.

[0008] Optionally, a sleeve is provided at the first end of the bent plate, and the sleeve is hollowly mounted on the fixed shaft. A through hole is provided on the fixed shaft above the sleeve, and the through hole is used to insert a limit pin to limit the upward movement of the sleeve along the vertical direction of the fixed shaft.

[0009] Optionally, a fixing platform is provided at one end of the lead screw, the fixing platform is fixed to one end of the lead screw, and the bottom surface of the fixing platform is used to fix the workpiece to be flipped on the flipping platform.

[0010] Optionally, the base is a long strip structure, and screw holes are provided on both sides of the bottom surface of the long side of the long strip structure, and the screw holes are used to insert screws so that the base is rigidly connected to the ground through the screws; fixed frames are respectively provided at the left and right ends of the base, and connecting rods are respectively provided at the left and right ends of the flip table, and the connecting rods are rotatably connected to the fixed frames through a rotating shaft.

[0011] Optionally, the fixing frame includes a first fixing frame plate and a second fixing frame plate, a gap is provided between the first fixing frame plate and the second fixing frame plate, and the rotating shaft is arranged in the gap.

[0012] Optionally, two of the oil cylinders are included, and the two oil cylinders are symmetrically arranged on both sides of the turning platform, and both of the two oil cylinders are single-acting oil cylinders.

[0013] Optionally, the turning platform includes a load-bearing frame and a supporting frame, wherein the load-bearing frame is located on the supporting frame and connected to the supporting frame;

[0014] When the workpiece to be flipped falls to the ground and completes flipping, the clamp is rotated to separate the flipped workpiece from the flip table, and the oil cylinder pushes the flip table to rotate and rise around the base. When the flip table rotates to the highest point, the oil cylinder stops supplying oil, and the flip table relies on the gravity of the carrier and the support frame to overcome the resistance of the oil cylinder and slowly rotates and descends around the base until the flip table falls to the ground.

[0015] The present application also provides a workpiece flipping method, using any of the above-mentioned devices, the workpiece flipping method comprises the following steps:

[0016] Fixing the workpiece to be flipped on the flip table by a fixture fixed on the flip table;

[0017] The oil cylinder pushes the turning table and the workpiece to be turned fixed on the turning table to rotate and rise around the base. When the turning table rotates to the highest point, the oil cylinder stops supplying oil and controls the return oil flow in the oil cylinder to be less than a preset threshold. The turning table and the workpiece to be turned fixed on the turning table rely on their own gravity to overcome the resistance of the oil cylinder and slowly rotate and descend around the base until the workpiece to be turned falls to the ground to complete the turning.

[0018] Compared with the prior art, this application has the following advantages:

[0019] The present application provides a device for flipping a workpiece, the device comprising: a base, a flip table and a cylinder; the base is used to be installed on the ground, the flip table is rotatably connected to the base, a clamp is arranged on the flip table, the clamp is fixed on the flip table, the clamp is used to fix the workpiece to be flipped on the flip table, the telescopic end of the cylinder is connected to the flip table, and the fixed end of the cylinder is connected to the base; the cylinder is used to push the flip table and the workpiece to be flipped fixed on the flip table to rotate and rise around the base, when the flip table rotates to the highest point, the cylinder stops supplying oil, and controls the return oil flow in the cylinder to be less than a preset threshold, the flip table and the workpiece to be flipped fixed on the flip table rely on their own gravity to overcome the resistance of the cylinder and slowly rotate and descend around the base until the workpiece to be flipped falls to the ground to complete the flipping.

[0020] It can be seen that the device provided in the present application includes a base, a turning table and a cylinder. Its structure is simple, and the turning table and the workpiece to be turned fixed on the turning table are pushed to rotate by the cylinder. When the turning table and the workpiece to be turned rotate to the highest point, that is, when the turning table and the workpiece to be turned flipped to 90°, the cylinder stops supplying oil, and the turning table and the workpiece to be turned fixed on the turning table slowly rotate downward from the highest point by relying on their own gravity until the workpiece to be turned falls to the ground and completes a 180° flip. It can be seen that the entire flipping process is simple and relatively easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a device for flipping a workpiece provided in an embodiment of the present application (with a workpiece to be flipped installed).

[0022] Figure 2 It is a partial schematic diagram of a device for flipping a workpiece provided in an embodiment of the present application (with a workpiece to be flipped installed).

[0023] Figure 3It is a schematic diagram of the flipping process of a device for flipping a workpiece provided in an embodiment of the present application (the workpiece to be flipped is not installed).

[0024] Figure 4 It is a schematic diagram of the structure of the clamp provided in an embodiment of the present application.

[0025] Figure 5 It is a cross-sectional view of the oil cylinder provided in an embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of the flipping process of a device for flipping a workpiece provided in an embodiment of the present application (installing the workpiece to be flipped).

[0027] Figure 7 It is a schematic diagram of the flipping process of a device for flipping a workpiece provided in an embodiment of the present application (the workpiece to be flipped is not installed and the center of gravity G1 of the device is marked).

[0028] Figure 8 It is a hydraulic system diagram provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 10: base; 101: bottom surface; 1011: screw hole; 102: fixing frame; 1021: first fixing frame plate; 1022: second fixing frame plate; 1023: rotating shaft;

[0031] 20: turning table; 201: bearing frame; 2011: connecting rod; 202: supporting frame;

[0032] 30: fixture; 301: shaft seat; 3011: fixed shaft; 3011-a: through hole; 3011-b: limit pin;

[0033] 302: bent plate; 3021: sleeve; 3022: nut; 303: lead screw; 3031: fixed platform;

[0034] 40: oil cylinder; 401: telescopic end; 402: fixed end;

[0035] 50: Workpiece to be flipped;

[0036] 60: Hydraulic system; 601: Hydraulic oil tank; 602: Oil filter; 603: Hydraulic pump; 604: Overflow valve; 605: Solenoid reversing valve; 606: Hydraulic control one-way valve; 607: One-way throttle valve; 608: Electronically controlled balancing valve; 609: Solenoid valve; 610: Speed ​​regulating valve. DETAILED DESCRIPTION

[0037] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0038] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the prior art, in the process of turning over large workpieces, the common in-situ turning tooling not only removes the lifting operation process, but also realizes 180° turning. In the process of turning over these large workpieces, multiple cylinders are often required to work together, that is, the first cylinder lifts and turns the large workpiece to about 90°, then connects to the second cylinder, and then removes the first cylinder, supports the first cylinder, and then the second cylinder works again to guide the large workpiece to turn over 180°. It can be seen that the existing in-situ turning tooling is complicated to manufacture, the operation process is relatively cumbersome, and the removal of the pin shaft will cause high labor intensity for workers, easy to make operating errors, and easy to cause serious accidents. Therefore, how to make the workpiece turning tooling simple in structure and easy to operate has become a technical problem to be solved.

[0041] To solve the above problems, the present application provides a device for flipping a workpiece, the device comprising: a base, a flip table and a cylinder; the base is used to be installed on the ground, the flip table is rotatably connected to the base, a clamp is arranged on the flip table, the clamp is fixed on the flip table, the clamp is used to fix the workpiece to be flipped on the flip table, the telescopic end of the cylinder is connected to the flip table, and the fixed end of the cylinder is connected to the base; the cylinder is used to push the flip table and the workpiece to be flipped fixed on the flip table to rotate and rise around the base, when the flip table rotates to the highest point, the cylinder stops supplying oil, and controls the return oil flow in the cylinder to be less than a preset threshold, the flip table and the workpiece to be flipped fixed on the flip table rely on their own gravity to overcome the resistance of the cylinder and slowly rotate and descend around the base until the workpiece to be flipped falls to the ground to complete the flipping.

[0042] It can be seen that the device provided in the present application includes a base, a turning table and a cylinder, and its structure is simple. The turning table and the workpiece to be turned fixed on the turning table are pushed to rotate by the cylinder. When the turning table and the workpiece to be turned rotate to the highest point, that is, when the turning table and the workpiece to be turned flipped to 90°, the cylinder stops supplying oil, and the turning table and the workpiece to be turned fixed on the turning table slowly rotate downward from the highest point by relying on their own gravity until the workpiece to be turned falls to the ground and completes a 180° flip. It can be seen that the flipping process is simple and the operation is relatively easy.

[0043] Next, we will combine Figure 1-8 A device for flipping a workpiece provided in the present application is described in detail.

[0044] As is known to all, industries such as wind power generation, automobile industry, agricultural machinery, aerospace, etc. often need to weld some workpieces during the manufacturing process, especially the welding of some large workpieces requires frequent flipping. Large workpieces generally refer to workpieces with relatively large size and relatively heavy weight. The workpieces in the device for workpiece flipping provided in this application refer to large workpieces, and the workpieces to be flipped fixed on the flipping table also refer to large workpieces. Of course, it is not excluded that the device for workpiece flipping provided in this application can flip small and medium-sized workpieces, or flip batches of small and medium-sized workpieces.

[0045] like Figure 1The figure is a schematic diagram of the structure of a device on which a workpiece to be flipped is installed. The present application provides a device for flipping a workpiece, and the device comprises: a base 10, a flip table 20 and a cylinder 40. The base 10 is used to be installed on the ground, the flip table 20 is rotatably connected to the base 10, a clamp 30 is provided on the flip table 20, the clamp 30 is fixed on the flip table 20, and the clamp 30 is used to fix the workpiece 50 to be flipped on the flip table 20, the telescopic end 401 of the cylinder is connected to the flip table 20, and the fixed end 402 of the cylinder is connected to the base 10.

[0046] like Figure 1 and Figure 2 As shown, the base 10 is a long strip structure, and screw holes 1011 are provided on both sides of the long side bottom surface 101 of the long strip structure, and the screw holes 1011 are used to insert screws, so that the base 10 is rigidly connected to the ground through the screws. The left and right ends of the base 10 are respectively provided with fixing frames 102, and the left and right ends of the flip table are respectively provided with connecting rods 2011, and the connecting rods 2011 are rotatably connected to the fixing frames 102 through rotating shafts 1023.

[0047] like Figure 1 As shown, the base 10 is a long strip structure, and the long strip structure includes a bottom surface 101 and a long plate, and the bottom surface 101 is located below the long plate and fixedly connected to the long plate. The bottom surface 101 and the long plate can be integrally formed, or fixed by other methods such as welding. Screw holes 1011 are arranged on both sides of the long side bottom surface 101 of the long strip structure, and the positions of the screw holes 1011 arranged on both sides can be symmetrical or asymmetrical, and the spacing between adjacent screw holes 1011 can be equal or unequal. Therefore, there is no restriction on the specific manner of arranging the screw holes 1011 on both sides of the long side bottom surface 101 of the long strip structure, as long as the screw is inserted into the screw hole 1011, the base 10 can be rigidly connected to the ground. Of course, the screw in the embodiment of the present application can be a ground anchor screw, or other fasteners.

[0048] like Figure 2As shown, a fixing frame 102 is arranged at the left and right ends of the long strip structure base, and the fixing frame 102 includes a first fixing frame plate 1021 and a second fixing frame plate 1022. There is a gap between the first fixing frame plate 1021 and the second fixing frame plate 1022, and the rotating shaft 1023 is arranged in the gap to connect the first fixing frame plate 1021 and the second fixing frame plate 1022. The first fixing frame plate 1021 and the second fixing frame plate 1022 are connected by the rotating shaft 1023, and the rotating shaft 1023 is also rotatably connected to the connecting rod 2011 on the flip table. The left and right ends of the flip table are respectively provided with connecting rods 2011, that is, the connecting rods 2011 are connected to the corresponding fixing frames 102, and the connecting rods 2011 are rotatably connected to the corresponding fixing frames 102 through the rotating shaft 1023, so that the connecting rods 2011 can rotate around the rotating shaft 1023. The connecting rod 2011 is extended from the carrier frame 201 of the flip table, so that the flip table is connected to the fixing frame on the base, that is, the flip table can rotate around the rotating shaft, that is, the flip table can rotate around the base. In the embodiment of the present application, the rotating shaft can also be a pin shaft.

[0049] The first fixing frame plate 1021 is provided with a through hole along its middle to its bottom, and the first fixing frame plate 1021 can be clamped and fixed to the long board through the through hole, and the shape of the through hole can match the structure of the long board to ensure that the first fixing frame plate 1021 can be firmly fixed to the long board. In addition, the second fixing frame plate 1022 is provided with a plug hole along its middle to its bottom, and the plug hole does not penetrate, and the second fixing frame plate 1022 can be fixed to the long board through the plug hole, that is, the second fixing frame plate 1022 is fixed to the outermost side of the long board, and the shape of the plug hole matches the structure of the long board. Of course, the plug hole can also be set as a through hole structure, which can be set according to specific working conditions.

[0050] When the flip table 20 is rotatably connected to the base 10 , that is, the flip table 20 can rotate around the base 10 , that is, the flip table 20 can rotate around the rotating shaft 1023 between the top of the first fixed frame plate 1021 and the top of the second fixed frame plate 1022 .

[0051] like Figure 3As shown, the flip table 20 includes a carrier 201 and a support frame 202, wherein the carrier 201 is located above the support frame 202 and connected to the support frame 202. Specifically, the carrier 201 is located above the support frame 202 and connected to the support frame 202, and the carrier 201 is used to carry the workpiece to be flipped, that is, the workpiece to be flipped is fixed on the carrier 201. In the embodiment of the present application, the carrier 201 is formed into a rectangular structure by a support rod, and a reinforcing frame is arranged in the middle of the rectangular structure. Of course, the number of reinforcing frames and the spacing between adjacent reinforcing frames can be set according to the size of the rectangular structure. Moreover, the long side of the rectangular structure extends toward the base 10 to form a connecting rod 2011, and is connected to the fixing frame 102 at the left and right ends of the base through a rotating shaft 1023.

[0052] A support frame 202 is connected below the carrier frame 201, and the support frame 202 is used to support the carrier frame 201 above it and the workpiece to be flipped fixed on the carrier frame 201. In the embodiment of the present application, the support frame 202 is composed of four vertical support rods and a connecting rod connecting the four vertical support rods together. In addition to the supporting function, the support frame 202 can also provide its own gravity during the upward rotation or downward rotation of the flip table to assist the upward or downward rotation of the flip table.

[0053] Of course, in addition to the above structures, the carrier 201 and the support frame can also be set according to specific working conditions, such as the carrier 201 can be set as a flat plate structure, or the support frame is composed of only four vertical support frames. The specific structures of the carrier 201 and the support frame are not limited here, as long as they meet the working needs. In order to make the entire workpiece turning device beautiful and easy to install, the width of the carrier 201 can be kept consistent with the length of the base, that is, the width of the turning table is equal to the length of the base.

[0054] like Figure 1As shown, the clamp 30 is fixed on the flip table 20, and the clamp 30 is used to fix the workpiece 50 to be flipped on the flip table 20. In the embodiment of the present application, in order to enable the clamp 30 on the flip table 20 to better fix the workpiece 50 to be flipped on the flip table 20, the clamp 30 is respectively fixed on the left and right sides of the carrier of the flip table 20, and the space reserved by the clamps 30 on the left and right sides can just install the workpiece 50 to be flipped on the carrier. By fixing the left and right sides of the workpiece 50 to be flipped, the workpiece 50 to be flipped can be more firmly fixed on the flip table 20 to prevent the workpiece 50 to be flipped from falling during the flipping process. In addition, the number of the clamps 30 on the left and right sides of the carrier is equal. In the embodiment of the present application, three clamps 30 are respectively arranged on the left and right sides of the carrier. There is no specific limitation on the specific position and number of the clamps 30 on the carrier, and the clamps 30 may be arranged according to the specific structure of the workpiece 50 to be flipped, so as to firmly fix the workpiece 50 to be flipped on the carrier.

[0055] Next, the specific structure of the clamp 30 will be described. Figure 1 and Figure 4 As shown, the clamp 30 includes a shaft seat 301, a bent plate 302 and a lead screw 303; the shaft seat 301 is fixed on the flip table 20, and a vertical fixed shaft 3011 is arranged on the shaft seat 301, and one end of the fixed shaft 3011 is fixed on the shaft seat 301; the first end of the bent plate 302 is horizontally rotatably mounted on the fixed shaft 3011, and a nut 3022 is arranged on the second end of the bent plate 302, and the lead screw 303 is connected in the nut 3022 to realize the up and down movement of the lead screw 303, and the lead screw 303 is used to fix the workpiece 50 to be flipped on the flip table 20 by moving up and down.

[0056] Specifically, Figure 3-4As shown, the fixture 30 is fixed on the left and right sides of the bearing frame 201 of the flip table, and the fixture 30 includes an axle seat 301, a bent plate 302 and a lead screw 303. The axle seat 301 can be a rectangular parallelepiped or a cube, or a cylindrical structure. Bolt holes are arranged around the axle seat 301. The axle seat 301 is fixed to the bearing frame 201 by inserting bolts into the bolt holes. There is no specific limit to the thickness of the axle seat 301, and it can be set according to specific actual needs. A vertical fixed shaft 3011 is arranged at the central position of the axle seat 301, that is, one end of the vertical fixed shaft 3011 is fixed on the axle seat 301, and one end of the fixed shaft 3011 can be welded on the axle seat 301, or a clamping hole is arranged at the central position of the axle seat 301, and a buckle is arranged at one end of the fixed shaft 3011, and the buckle cooperates with the clamping hole to fix one end of the fixed shaft 301 on the axle seat 301. Moreover, the height of the fixed shaft 301 can be determined according to actual working conditions and is not specifically limited here.

[0057] Among them, a sleeve 3021 is provided at the first end of the bent plate 302, and the sleeve 3021 is loosely mounted on the fixed shaft 3011. A through hole 3011-a is provided on the fixed shaft 3011 above the sleeve 3021, and the through hole 3011-a is used to insert a limit pin 3011-b to limit the sleeve 3021 from moving upward along the vertical direction of the fixed shaft.

[0058] Specifically, a sleeve 3021 is provided at the first end of the bent plate, and the sleeve 3021 is a hollow cylindrical structure. The sleeve 3021 is loosely sleeved on the fixed shaft 3011, and the loose sleeve has a gap between the sleeve 3021 and the fixed shaft 3011, so that the first end of the bent plate can be horizontally rotated around the fixed shaft 3011. After the workpiece 50 to be flipped on the flip table 20 is separated from the flip table 20, the first end of the bent plate can be rotated around the fixed shaft 3011 by rotating the bent plate 302, that is, the bent plate 302 and the lead screw 303 connected to the bent plate 302 can bypass the workpiece 50 to be flipped, so that the workpiece 50 to be flipped can be removed from the flip table 20 conveniently. At the same time, a through hole 3011-a is provided on the fixed shaft 3011 above the sleeve 3021, and the through hole 3011-a is located above the sleeve 3021. When the sleeve 3021 is empty-mounted on the fixed shaft 3011 and the limit pin 3011-b is inserted into the through hole 3011-a above the sleeve 3021, the sleeve 3021 can be restricted from moving upward in the vertical direction of the fixed shaft 3011.

[0059] A nut 3022 is provided at the second end of the bent plate, and the lead screw 303 is connected to the nut 3022, that is, the nut 3022 is sleeved on the lead screw 303 to enable the lead screw 303 to move up and down along the nut 3022. The lead screw 303 is used to fix the workpiece 50 to be flipped on the flip table 20 by moving up and down.

[0060] A fixing platform 3031 is provided at one end of the lead screw 303, and the fixing platform 3031 is fixed at one end of the lead screw 303. The bottom surface of the fixing platform 3031 is used to fix the workpiece 50 to be flipped on the flipping table 20. Specifically, a fixing platform 3031 is provided at one end of the lead screw 303, and the area of ​​the horizontal cross section of the fixing platform 3031 is larger than the area of ​​the horizontal cross section of the lead screw 303. It can be understood that the bottom surface of the fixing platform 3031 is used to fix the workpiece 50 to be flipped on the flipping table 20, that is, the fixing platform 3031 fixed at one end of the lead screw 303 can increase the contact area between the lead screw 303 and the workpiece 50 to be flipped, and can better fix the workpiece 50 to be flipped on the flipping table 20. The fixing platform 3031 can be fixed to one end of the lead screw 303 by threading, and can also be fixed to one end of the lead screw 303 by welding. Furthermore, there is no specific limitation on the specific structure of the fixing platform 3031. The fixing platform 3031 may be a cylindrical structure, or a cube or a rectangular parallelepiped structure.

[0061] Moreover, an operating rod is provided at the other end of the lead screw 303, and the lead screw 303 can be moved up and down in the nut 3022 by rotating the operating rod. When the lead screw 303 moves downward in the nut 3022, the length of the lead screw 303 below the nut 3022 becomes longer, so that the fixed platform 3031 can fix the workpiece 50 to be turned on the turning platform 20. When the lead screw 303 moves upward in the nut 3022, the length of the lead screw 303 below the nut 3022 becomes shorter, and the fixed platform 3031 is separated from the workpiece (the turned workpiece). At this time, the bending plate 302 can be horizontally rotated around the fixed axis 3011, so that the workpiece (the turned workpiece) can be easily removed from the turning platform 20.

[0062] The device comprises two oil cylinders 40 , which are symmetrically arranged on both sides of the turning platform 20 , and both of the oil cylinders 40 are single-acting oil cylinders.

[0063] Specifically, Figure 1As shown, the two oil cylinders 40 are symmetrically arranged on both sides of the turning platform 20 and the base 10, that is, one oil cylinder 40 is arranged on the left side of the turning platform 20 and the base 10, and the other oil cylinder 40 is arranged on the right side of the turning platform 20 and the base 10. Both oil cylinders 40 are single-acting oil cylinders, which are driven by hydraulic oil in only one direction and reset in the other direction by spring or gravity. Figure 5 As shown, the oil cylinder 40 includes a piston rod and a cylinder barrel, the piston rod is located in the inner cavity of the cylinder barrel, the piston rod is the telescopic end 401 of the oil cylinder, the telescopic end 401 of the oil cylinder is connected to the flip table 20, it can be understood that one end of the piston rod can be fixed to the outermost bracket of the bearing frame of the flip table through a pin shaft, and the other end of the piston rod is located in the inner cavity of the cylinder barrel. One end of the cylinder barrel is the fixed end 402 of the oil cylinder, the fixed end 402 of the oil cylinder is connected to the base 10, that is, one end of the cylinder barrel can be fixed to the bottom surface of the base through a pin shaft.

[0064] like Figure 1 As shown, the height of the supporting frame of the turning platform 20 is higher than the bottom surface of the base 10. When the cylinder 40 is installed on the turning platform 20 and the base 10, the telescopic end 401 of the cylinder is located on the higher turning platform 10, and the fixed end 402 of the cylinder is located on the bottom surface 101 of the base, that is, the cylinder forms a certain angle with the horizontal direction, and the angle can be determined according to the actual working conditions.

[0065] like Figure 6 As shown, the oil cylinder 40 is used to push the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 to rotate and rise around the base 10. When the turning table 20 rotates to the highest point, the oil cylinder 40 stops supplying oil and controls the return oil flow in the oil cylinder 40 to be less than a preset threshold. The turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 rely on their own gravity to overcome the resistance of the oil cylinder 40 and slowly rotate and descend around the base 10 until the workpiece 50 to be turned over falls to complete the turning.

[0066] When the motor starts and drives the oil cylinder 40 to work, and oil begins to flow into the rodless cavity of the oil cylinder 40, the two oil cylinders 40 push the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 by the clamp 30 to rotate and rise around the base 10, that is, the two oil cylinders 40 push the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 to rotate and rise around the rotating shaft on the left and right sides of the base 10 through the piston rod. When the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 rotate and rise to the highest position, that is, the workpiece 50 to be flipped on the flip table 20 has been flipped 90°, the oil cylinder 40 stops feeding oil, and controls the amount of oil returned in the oil cylinder 40 to be less than a preset threshold value, which is determined according to the specific structure of the oil cylinder 40. At this time, Figure 6 As shown, the center of gravity G of the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 is biased toward one side of the workpiece 50 to be turned over, and the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 rely on their own gravity to rotate and descend around the rotating shafts on the fixed frames on the left and right sides of the base 10. During the descent, it is necessary to overcome the resistance of the cylinder 40 so that the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 slowly rotate and descend until the workpiece 50 to be turned over falls to the ground, that is, the workpiece to be turned over completes a 180° flip.

[0067] It should be noted that the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 need to overcome the resistance of the oil cylinder 40 during the descent process, wherein the main resistance is the internal resistance of the hydraulic system of the oil cylinder 40, that is, the resistance of the throttle valve in the hydraulic control system. The throttle valve controls the descent speed by adjusting the flow of hydraulic oil, thereby ensuring a smooth and controllable descent process. Of course, there are other resistances, such as mechanical friction resistance, air resistance or inertial force.

[0068] When the workpiece 50 to be flipped falls to the ground and completes flipping, the clamp 30 is rotated to separate the flipped workpiece from the flip table 20, and the oil cylinder 40 pushes the flip table 20 to rotate and rise around the base 10. When the flip table 20 rotates to the highest point, the oil cylinder 40 stops supplying oil, and the flip table 20 relies on the gravity of the carrier and the support frame to overcome the resistance of the oil cylinder 40 and slowly rotates and descends around the base 10 until the flip table 20 falls to the ground.

[0069] Specifically, when the workpiece to be flipped completes a 180° flip and falls to the ground, the clamp 30 is rotated so that the clamp 30 releases the flipped workpiece, separates the flipped workpiece from the flip table 20, and removes the flipped workpiece from the flip table 20. At this time, there is no workpiece fixed on the flip table 20. The motor drives the cylinder 40 and injects oil into the cylinder 40. The cylinder 40 pushes the flip table 20 to rotate and rise around the base 10. That is, the two cylinders 40 push the flip table to rotate and rise around the shafts on the fixed frames on the left and right sides of the base through the piston rod. When the flip table rotates and rises to the highest position, that is, the flip table has flipped 90°, the cylinder 40 stops injecting oil, and the amount of oil returned in the cylinder 40 is controlled to be less than a preset threshold value, and the preset threshold value is determined according to the specific structure of the cylinder 40. At this time, Figure 7 As shown, the center of gravity G1 of the flip table 20 is biased toward one side of the flip table support frame, and the flip table 20 relies on the gravity of the load-bearing frame and the support frame to rotate and descend around the rotating shafts on the fixed frames on the left and right sides of the base. During the descent, it is necessary to overcome the resistance of the cylinder 40 so that the flip table 20 slowly rotates and descends until the flip table 20 lands, completing a flip cycle.

[0070] The device provided by the present application is composed of a base 10, a turning table 20 and an oil cylinder 40. The workpiece 50 to be turned is fixed on the turning table 20 by the fixture 30 of the turning table. The turning table 20 and the workpiece 50 to be turned fixed on the turning table 20 are pushed by the oil cylinder 40 to rotate and rise around the base 10 together. When they rise to the highest point, that is, when the workpiece to be turned is turned to 90°, the oil cylinder 40 stops feeding oil. From the highest point, the turning table 20 and the workpiece 50 to be turned fixed on the turning table 20 rely on their own gravity to overcome the resistance of the oil cylinder 40 and slowly rotate and descend around the base 10 until the workpiece to be turned completes a 180° turn. It can be seen that the device has a simple structure, does not require the oil cylinder to be disassembled, and is easy to operate.

[0071] The present application also provides a workpiece flipping method, using any of the above-mentioned devices for workpiece flipping, the workpiece flipping method comprises the following steps:

[0072] Fixing the workpiece 50 to be flipped on the flip table 20 by means of a fixture 30 fixed on the flip table 20;

[0073] The oil cylinder 40 pushes the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 to rotate and rise around the base 10. When the turning table 20 rotates to the highest point, the oil cylinder 40 stops supplying oil and controls the return oil flow in the oil cylinder 40 to be less than a preset threshold. The turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 rely on their own gravity to overcome the resistance of the oil cylinder 40 and slowly rotate and descend around the base 10 until the workpiece 50 to be turned over falls to complete the turning.

[0074] Specifically, the workpiece flipping method adopts the above-mentioned device for flipping a workpiece. The structure of the device for flipping a workpiece can refer to the above-mentioned embodiment, and will not be repeated here.

[0075] When it is necessary to flip the workpiece 50 by 180°, the workpiece 50 is fixed on the flipping table 20 by the clamp 30 fixed on the flipping table 20. That is, at this time, it is necessary to ensure that the workpiece 50 is tightly fixed on the flipping table 20 by the clamp 30 to avoid accidents such as the workpiece 50 falling during the flipping process.

[0076] After the workpiece 50 to be flipped has been fixed on the flip table 20, the engine is started to drive the cylinder 40 to work, and the cylinder 40 pushes the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 to rotate and rise around the base 10. When the flip table 20 rotates to the highest point, that is, at this time, the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 have been flipped 90°, the cylinder 40 stops supplying oil and controls the return oil amount in the cylinder 40 to be less than a preset threshold value, and the preset threshold value is determined according to the specific structure of the cylinder 40. At this time, the gravity of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 is biased toward one side of the workpiece to be turned 50, and the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 rely on their own gravity to rotate and descend around the rotating shafts on the fixed frames on the left and right sides of the base 10. During the descent, it is necessary to overcome the resistance of the cylinder 40 so that the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 slowly rotate and descend until the workpiece to be turned 50 falls to the ground, that is, the workpiece to be turned 50 completes a 180° flip.

[0077] When the turning table 20 rotates to the highest point and cannot be lowered, the manual handle of the solenoid valve 609 in the hydraulic system 60 of the oil cylinder 40 is pulled to achieve the slow descent of the turning table 20 and the workpiece 50 to be turned fixed on the turning table 20 .

[0078] Specifically, when the turning table 20 rotates to the highest point, that is, when the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 are turned 90°, the center of gravity of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 is at the center of the entire device, so that the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 cannot rely on their own gravity to drive the turning table 20 to slowly descend around the base 10. At this time, it is necessary to pull the manual handle of the solenoid valve 609 in the hydraulic system 60 of the oil cylinder to achieve the slow descent of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20.

[0079] like Figure 8As shown, the hydraulic system 60 has other components in addition to the solenoid valve 609. In the embodiment of the present application, the hydraulic system 60 also includes a hydraulic oil tank 601, which is a container for storing hydraulic oil and provides oil for the entire hydraulic system. The oil filter 602 is installed on the pipeline of the throttle valve oil inlet, which can filter impurities in the oil, such as metal particles, dust, moisture, etc. The oil filter 602 can also be installed inside or at the bottom of the hydraulic oil tank. There is no specific restriction on the specific location. The hydraulic pump 603 is the power element of the hydraulic system. It converts the mechanical energy of the prime mover into the pressure energy of the liquid and provides power to the entire hydraulic system. There are many types of hydraulic pumps 603, such as gear pumps, vane pumps, plunger pumps, etc., which can be selected according to specific working conditions. The overflow valve 604, also known as a safety valve or a pressure relief valve, for example, if the hydraulic pump 603 suddenly stops working or the load suddenly increases, the system pressure may rise sharply. In this case, the overflow valve 604 will open quickly to release excess pressure and protect other components in the system from damage. The electromagnetic reversing valve 605, also known as the electromagnetic control valve or electromagnetic directional control valve, is mainly used to control the flow direction of the hydraulic oil, thereby changing the action direction of the oil cylinder. The hydraulically controlled one-way valve 606, also known as the hydraulically controlled one-way valve or the hydraulically controlled check valve, is mainly used to control the one-way flow of the hydraulic oil and allow reverse flow under certain conditions. The hydraulically controlled one-way valve 606 is usually composed of a main valve core and a control piston. The main valve core controls the one-way flow of the oil, and the control piston controls the action of the main valve core through the pressure of the control port. When there is no pressure in the control port, the main valve core remains closed under the action of the spring, allowing only the oil to flow from the inlet to the outlet, preventing reverse flow. When the control port receives a certain pressure of hydraulic oil, the control piston pushes the main valve core to move, so that the main valve core opens, allowing the oil to flow from the outlet to the inlet, and realizing reverse flow. The one-way throttle valve 607, also known as a one-way flow control valve, is mainly used to control the flow direction and flow of the oil. It combines the functions of a one-way valve and a throttle valve, and can provide different flow characteristics in different directions. The electronically controlled balancing valve 608, also known as the electronically controlled balancing valve or the electronically controlled proportional balancing valve, is mainly used to control and adjust the movement speed and stability of the oil cylinder. The speed regulating valve 610, also known as the flow control valve or the throttle valve, is mainly used to adjust and control the flow of the oil, thereby controlling the speed of the oil cylinder. The various components in the hydraulic system are connected by connecting pipes to form a complete hydraulic system. Of course, in addition to the above components, the hydraulic system has other components, which will not be described one by one here.

[0080] Next, the working process of the hydraulic system will be briefly described:

[0081] The motor drives the hydraulic pump 603 to work, and the hydraulic pump 603 works to make the hydraulic oil in the hydraulic oil tank 601 pass through the oil filter 602, the electromagnetic reversing valve 605, the hydraulic control one-way valve 606, the one-way throttle valve 607, and the electronically controlled balance valve 608 to drive the oil cylinder 40 to work. The left and right oil cylinders 40 push the turning table 20 and the workpiece 50 to be turned fixed on the turning table 20 to rotate and rise. When the electromagnetic reversing valve 605 is switched, the electronically controlled balance valve 608 and the electromagnetic valve 609 are turned on, and the turning table 20 and the workpiece 50 to be turned fixed on the turning table 20 complete a 180° turn by descending due to their own gravity. During the flipping process, the overflow valve 604 acts as a safety valve to prevent the system from overloading, thus playing a safety role; when the one-way throttle valve 607 rises, the hydraulic oil enters the lower chamber of the oil cylinder 40 from the one-way throttle valve 607, and when it descends, the hydraulic oil returns to the lower chamber of the oil cylinder 40, and the throttling resistance of the one-way throttle valve 607 limits the descending speed to a certain extent; the speed regulating valve 610 controls the descending speed; when the electromagnetic reversing valve 605 is powered off, the oil cylinder 40 relies on the hydraulic one-way valve 606 to maintain pressure, and the load does not move. In order to make the entire device descend smoothly, an electrically controlled balancing valve 608 is set on the oil return line, and the balancing circuit maintains pressure so that the descending speed is not affected by the workpiece to be flipped, and the one-way throttle valve 607 adjusts the flow to control the descending speed. When the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 are at a high position and cannot be lowered, the manual handle of the solenoid valve 609 can be pulled to control the direction of the hydraulic oil, thereby controlling the extension and retraction of the oil cylinder, so that the turning table 20 and the workpiece 50 to be turned over fixed on the turning table 20 can land smoothly and complete the turning.

[0082] It should be noted that, although several structures, components or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, according to the specific implementation of the present application, the features and functions of two or more structures, components or units described above can be concretized in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided into multiple components, structures or units to be concretized.

[0083] In addition, although the components and the installation methods of the components or devices in the present application are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed according to the specific components or the installation methods of the components, or that all the components shown must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve corresponding functions, and / or one component can be decomposed into multiple components to achieve corresponding functions, etc.

[0084] Although the present application is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present application. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A device for turning over a workpiece, characterized in that: The device comprises: a base, a turning table and a cylinder; The base is used to be installed on the ground, the turning table is rotatably connected to the base, a clamp is provided on the turning table, the clamp is fixed on the turning table, the clamp is used to fix the workpiece to be turned on the turning table, the telescopic end of the oil cylinder is connected to the turning table, and the fixed end of the oil cylinder is connected to the base; The oil cylinder is used to push the turning table and the workpiece to be turned fixed on the turning table to rotate and rise around the base. When the turning table rotates to the highest point, the oil cylinder stops supplying oil and controls the return oil flow in the oil cylinder to be less than a preset threshold. The turning table and the workpiece to be turned fixed on the turning table rely on their own gravity to overcome the resistance of the oil cylinder and slowly rotate and descend around the base until the workpiece to be turned falls to the ground to complete the turning.

2. The device according to claim 1, characterized in that The fixture comprises a shaft seat, a bending plate and a lead screw; The shaft seat is fixed on the turning platform, and a vertical fixed shaft is arranged on the shaft seat, and one end of the fixed shaft is fixed on the shaft seat; The first end of the bent plate is horizontally rotatably mounted on the fixed shaft, the second end of the bent plate is provided with a nut, the lead screw is connected in the nut to enable the lead screw to move up and down, and the lead screw is used to fix the workpiece to be flipped on the flip table by moving up and down.

3. The device according to claim 2, characterized in that A sleeve is provided at the first end of the bent plate, and the sleeve is hollowly mounted on the fixed shaft. A through hole is provided on the fixed shaft above the sleeve, and the through hole is used to insert a limit pin to limit the sleeve from moving upward along the vertical direction of the fixed shaft.

4. The device according to claim 2, characterized in that A fixing platform is provided at one end of the lead screw, and the fixing platform is fixed to one end of the lead screw. The bottom surface of the fixing platform is used to fix the workpiece to be turned over on the turning platform.

5. The device according to claim 1, characterized in that The base is a long strip structure, and screw holes are arranged on both sides of the bottom surface of the long side of the long strip structure, and the screw holes are used to insert screws, so as to rigidly connect the base to the ground through the screws; The left and right ends of the base are respectively provided with fixing frames, and the left and right ends of the turning platform are respectively provided with connecting rods, and the connecting rods are rotatably connected to the fixing frames through rotating shafts.

6. The device according to claim 5, characterized in that The fixing frame includes a first fixing frame plate and a second fixing frame plate. There is a gap between the first fixing frame plate and the second fixing frame plate, and the rotating shaft is arranged in the gap.

7. The device according to claim 1, characterized in that It comprises two oil cylinders, which are symmetrically arranged on both sides of the turning platform, and both of them are single-acting oil cylinders.

8. The device according to claim 1, characterized in that The turning table comprises a bearing frame and a supporting frame, wherein the bearing frame is located on the supporting frame and connected to the supporting frame; When the workpiece to be flipped falls to the ground and completes flipping, the clamp is rotated to separate the flipped workpiece from the flip table, and the oil cylinder pushes the flip table to rotate and rise around the base. When the flip table rotates to the highest point, the oil cylinder stops supplying oil, and the flip table relies on the gravity of the carrier and the support frame to overcome the resistance of the oil cylinder and slowly rotates and descends around the base until the flip table falls to the ground.

9. A workpiece flipping method, characterized in that: Using the device described in any one of claims 1 to 8, the workpiece flipping method comprises the following steps: Fixing the workpiece to be flipped on the flip table by a fixture fixed on the flip table; The oil cylinder pushes the turning table and the workpiece to be turned fixed on the turning table to rotate and rise around the base. When the turning table rotates to the highest point, the oil cylinder stops supplying oil and controls the return oil flow in the oil cylinder to be less than a preset threshold. The turning table and the workpiece to be turned fixed on the turning table rely on their own gravity to overcome the resistance of the oil cylinder and slowly rotate and descend around the base until the workpiece to be turned falls to the ground to complete the turning.

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